Patents by Inventor Akihiro Kaneko

Akihiro Kaneko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11287757
    Abstract: A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: March 29, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Nakajima, Akihiro Kaneko, Yoshitaka Yamauchi, Katsunori Kurose, Hyo Shu
  • Publication number: 20220066344
    Abstract: A toner includes polyolefin and has an exothermic peak in a range from 40° C. to 70° C. in a cooling process of the polyolefin by the DSC after a first heating process of the polyolefin by DSC. The polyolefin does not have an exothermic peak in the cooling process of the polyolefin by the DSC after the first heating process of the polyolefin by the DSC, and has an exothermic peak in a range from 0° C. to 30° C. in a second heating process of the polyolefin by the DSC.
    Type: Application
    Filed: August 27, 2021
    Publication date: March 3, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Toyoshi SAWADA, Kazumi Suzuki, Katsunori Kurose, Akihiro Kaneko, Motoshi Iizuka
  • Patent number: 11256188
    Abstract: Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: February 22, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Akihiro Kaneko, Kazumi Suzuki, Hisashi Nakajima, Yoshitaka Yamauchi, Kohtaroh Ogino, Teruyuki Suzuki, Namie Suzuki
  • Publication number: 20210356862
    Abstract: An actinic ray-sensitive or radiation-sensitive resin composition includes a compound represented by General Formula (I) and an acid-decomposable resin.
    Type: Application
    Filed: May 4, 2021
    Publication date: November 18, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Masafumi KOJIMA, Minoru UEMURA, Akihiro KANEKO, Akiyoshi GOTO, Kei YAMAMOTO
  • Publication number: 20210341851
    Abstract: Printed matter is provided which includes a recording medium, a colored layer overlying the recording medium, and an infrared-absorbing-pigment-containing layer overlying the recording medium and underlying the colored layer. The colored layer contains a colorant. The infrared-absorbing-pigment-containing layer contains an infrared absorbing pigment having an average diameter of from 120 to 250 nm in the infrared-absorbing-pigment-containing layer.
    Type: Application
    Filed: November 27, 2019
    Publication date: November 4, 2021
    Inventors: Kazumi SUZUKI, Masaki YOSHINO, Nekka MATSUURA, Toyoshi SAWADA, Akihiro KANEKO
  • Publication number: 20210286264
    Abstract: An actinic ray-sensitive or radiation-sensitive resin composition includes a resin and a compound that generates an acid upon irradiation with actinic rays or radiation, in which an A value determined by Formula (1) is 0.130 or more, and the compound that generates an acid upon irradiation with actinic rays or radiation includes one or more selected from the group consisting of a compound (I) to a compound (III).
    Type: Application
    Filed: May 17, 2021
    Publication date: September 16, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Akihiro Kaneko, Masafumi Kojima, Minoru Uemura, Akiyoshi Goto, Michihiro Shirakawa
  • Publication number: 20210216012
    Abstract: The present invention provides an actinic ray-sensitive or radiation-sensitive resin composition which is excellent in LER performance and a collapse suppressing ability. Furthermore, the present invention provides a resist film, a pattern forming method, and a method for manufacturing an electronic device. The actinic ray-sensitive or radiation-sensitive resin composition of an embodiment of the present invention includes an acid-decomposable resin having a repeating unit represented by General Formula (I), and a compound that generates an add upon irradiation with actinic rays or radiation.
    Type: Application
    Filed: March 25, 2021
    Publication date: July 15, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Akihiro KANEKO, Kazunari Yagi, Takashi Kawashima, Akiyoshi Goto
  • Publication number: 20210165323
    Abstract: The present invention provides an actinic ray-sensitive or radiation-sensitive resin composition which is excellent in LER performance and a collapse suppressing ability. Furthermore, the present invention provides a resist film, a pattern forming method, and a method for manufacturing an electronic device. The actinic ray-sensitive or radiation-sensitive resin composition of an embodiment of the present invention includes a resin having a polarity that increases by the action of an acid; and a compound that generates an acid upon irradiation with actinic rays or radiation, in which the resin has a repeating unit represented by General Formula (B-1).
    Type: Application
    Filed: February 8, 2021
    Publication date: June 3, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Kazunari YAGI, Akihiro KANEKO, Takashi KAWASHIMA, Akiyoshi GOTO
  • Publication number: 20210072656
    Abstract: Provided is a toner including toner particles, each toner particle includes: a base particle including a binder resin; and external additive particles, wherein the external additive particles include particles each having an equivalent circle diameter of 10 nm or greater, a volume average particle diameter of the particles each having an equivalent circle diameter of 10 nm or greater is 80 nm or greater but 140 nm or less, and a ratio (circumscribed circle area/particle area) of a circumscribed circle area of the particle having an equivalent circle diameter of 10 nm or greater to a particle area of the particle having an equivalent circle diameter of 10 nm or greater is 1.60 or greater but 2.60 or less.
    Type: Application
    Filed: December 26, 2018
    Publication date: March 11, 2021
    Inventors: Akihiro KANEKO, Kazumi SUZUKI, Hisashi NAKAJIMA, Yoshitaka YAMAUCHI, Kohtaroh OGINO, Teruyuki SUZUKI, Namie SUZUKI
  • Publication number: 20200393762
    Abstract: An object of the present invention is to provide an actinic ray-sensitive or radiation-sensitive resin composition with which a pattern thus formed has excellent LER and collapse suppressing ability. Furthermore, another object of the present invention is to provide a resist film, a pattern forming method, a method for manufacturing an electronic device, each using the actinic ray-sensitive or radiation-sensitive resin composition. In addition, still another object of the present invention is to provide a resin which can be used in the actinic ray-sensitive or radiation-sensitive resin composition.
    Type: Application
    Filed: August 26, 2020
    Publication date: December 17, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Michihiro OGAWA, Takashi Kawashima, Akihiro Kaneko, Akiyoshi Goto
  • Publication number: 20200363743
    Abstract: A toner including a strontium titanate powdery material as an external additive, the strontium titanate powdery material including Si-containing particles on a surface of the strontium titanate powdery material, the Si-containing particles having a number average circle equivalent diameter of 5 nm or more but 15 nm or less.
    Type: Application
    Filed: April 22, 2020
    Publication date: November 19, 2020
    Inventors: Hisashi NAKAJIMA, Akihiro Kaneko, Yoshitaka Yamauchi, Katsunori Kurose, Hyo Shu
  • Publication number: 20200333720
    Abstract: A toner is provided. The toner comprises a maleic-acid-modified polyolefin having a polypropylene block in a main chain and having a weight average molecular weight of 60,000 or more.
    Type: Application
    Filed: April 7, 2020
    Publication date: October 22, 2020
    Inventors: Toyoshi SAWADA, Kazumi SUZUKI, Katsunori KUROSE, Akihiro KANEKO
  • Publication number: 20200319551
    Abstract: The present invention provides an actinic ray-sensitive or radiation-sensitive resin composition that can provide a resist film with excellent sensitivity and a pattern with excellent LER performance, and can suppress pattern collapse during pattern formation. In addition, the present invention also provides a resist film, a pattern forming method, a mask blank with a resist film, a method for producing a photomask, and a method for manufacturing an electronic device, each using the actinic ray-sensitive or radiation-sensitive resin composition.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Tomotaka Tsuchimura, Takashi Kawashima, Akihiro Kaneko, Michihiro Ogawa, Michihiro Shirakawa, Hajime Furutani, Kyohei Sakita
  • Publication number: 20200298440
    Abstract: Provided is a method for forming a flying body using optical vortex laser, the method including irradiating an opposite surface of a base to a surface of the base, on which a light-absorbing material is disposed, with an optical vortex laser beam to generate a liquid column or liquid droplet having a diameter smaller than an irradiation diameter of the optical vortex laser beam from the light-absorbing material in an irradiation direction of the optical vortex laser beam.
    Type: Application
    Filed: March 16, 2020
    Publication date: September 24, 2020
    Inventors: Jun Aoto, Muneaki Iwata, Kazumi Suzuki, Hiroyuki Suhara, Akihiro Kaneko, Takashige Omatsu, Ryosuke Nakamura
  • Publication number: 20200183280
    Abstract: An actinic ray-sensitive or radiation-sensitive resin composition is an actinic ray-sensitive or radiation-sensitive resin composition including a compound that generates an acid upon irradiation with actinic rays or radiation and a resin capable of increasing polarity by the action of an acid, in which the resin includes a repeating unit represented by General Formula (B-1) and at least one halogen atom selected from the group consisting of a fluorine atom and an iodine atom.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 11, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Michihiro OGAWA, Akihiro KANEKO, Takashi KAWASHIMA, Tomotaka TSUCHIMURA
  • Publication number: 20200124963
    Abstract: An actinic ray-sensitive or radiation-sensitive resin composition includes a resin having a group represented by General Formula (1) and a compound that generates an acid upon irradiation with actinic rays or radiation.
    Type: Application
    Filed: December 20, 2019
    Publication date: April 23, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Akihiro KANEKO, Junichi Ito, Takashi Kawashima, Michihiro Ogawa, Tomotaka Tsuchimura
  • Patent number: 10627732
    Abstract: A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan ?), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85° C. to 110° C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85° C. to 120° C.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: April 21, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohtaroh Ogino, Yoshitaka Yamauchi, Akihiro Kaneko, Kazumi Suzuki, Hisashi Nakajima
  • Patent number: 10620557
    Abstract: A toner comprising a binder resin and a near-infrared light absorbing material is provided. The toner in the form of a pellet has: a chroma C* of 20 or less in the L*C*h color space; a hue angle h of from 50 to 90 degrees in the L*C*h color space; and a spectral reflectance of 5% or less at a wavelength of from 800 to 900 nm.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: April 14, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Toyoshi Sawada, Kazumi Suzuki, Yu Naito, Akihiro Kaneko
  • Patent number: 10599059
    Abstract: A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 ?m2 image area of the toner observed with a field-emission scanning electron microscope.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: March 24, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Namie Suzuki, Kazumi Suzuki, Hisashi Nakajima, Yoshitaka Yamauchi, Kohtaroh Ogino, Akihiro Kaneko
  • Patent number: 10578988
    Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: March 3, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki, Hisashi Nakajima, Saori Yamada, Yu Naito, Akihiro Kaneko